ART. 23 REVISION OF THE BEETLE GENUS OEDIONYCHIS BLAKE 29 



21. OEDIONYCHIS TEXANA Crotch , 



Fig. 24 



Oedionychis texana Croi-ch, Proc. Acad. Philadelphia, vol. 25, 1873, p. 63. — 

 Horn, Proc. Amer. Ent. Soc, vol. 16, 1889, p. 191. 



Elongate oblong-oval, moderately shining, yellow, usually with 

 darker brown head, elytra with piceous sutural vitta and sometimes 

 a median vitta, the latter often abbreviated or sometimes disappear- 

 ing entirely. Antennae slender, over half as long as body, basal 

 joints reddish brown, outer ones darker, third joint sometimes a little 

 shorter than fourth. Head usually reddish brown on occiput, finely 

 punctate, interocular space half width of head, median groove indis- 

 tinct. Pronotum barely twice as wide as long, only slightly narrowed 

 anteriorly, with narrow explanate margin; very faintly punctate. 

 Scutellum piceous. Elytra oblong, scarcely wider at base than pro- 

 thorax, with very faint trace of humeral prominences, and sides 

 nearly parallel; margin narrowly explanate; punctations fine and 

 shallow, nearly smooth at apex; a piceous sutural vitta of varying 

 width extending to apex and occasionally two other vittae, one in 

 middle of each elytron, these often abbreviated or united with sutural 

 vitta, or disappearing entirely, never reaching apex. Body beneath 

 deeper yellow, finely pubescent, epipleura pale. 



Length. — 3 to 5 mm. ; width 1.5 to 2.5 mm. 



Type locality. — Texas. 



Distributimi. — Texas. 



22. OEDIONYCHIS FLAVIDA Horn 



Fig. 25 

 Oedionychis fiavida Horn, Trans. Amer. Ent. Soc, vol. 16, 1889, p. 190. 



Elongate-oblong with sides nearly parallel, moderately shining, 

 pale yellow, nearly impunctate. Antennae slender, about half as 

 long as body, pale, outer joints slightly darker but not piceous, third 

 joint shorter than fourth. Head pale, entirely smooth and shining, 

 with deep transverse but no vertical median groove ; interocular space 

 half width of head. Pronotum over twice as wide as long, with 

 arcuate sides and rather narrow explanate margin ; narrowed slightly 

 anteriorly making apex and base nearly the same width; shining, 

 immaculate, impunctate. Scutellum slightly darker yellow brown. 

 Elytra elongate, narrow, with sides nearly parallel; humeral prom- 

 inences and sulcus within not at all marked; explanate margin not 

 wide; pale yellow, moderately shining and smooth. Body beneath 

 finely pubescent, deeper yellow brown, epipleura pale. 



Length. — 4 to 5 mm. ; width 2.5 mm. 



Type locality. — El Paso, Tex. 



Distnhution. — Texas, New Mexico. 



